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Metra 70-1720T Receiver Wiring Harness

First, attach the color-coded wires on your Crutchfield-supplied harness to the wires from your new stereo. If you're not using a soldering iron, we recommend that you purchase some wire connectors to secure the connections. Check out our handy article on three ways to connect the wiring harness here.

Now, once this harness is connected to your new stereo, you'll be able to plug right into your car's factory radio connector. This harness makes installing your new stereo easier, and allows you to put the factory radio back when you sell your vehicle or return it at the end of the lease. A detailed instruction sheet comes with the harness. Warranty: 60 days.

Please read this important note: This harness may not contain provisions for every wire needed to complete your installation, and it will not accommodate special navigation, video, or factory steering wheel control connections. You will need a special adapter if you want your factory steering wheel audio controls to work with your new stereo.

Connections:

Note: In order to retain your factory keyless entry functionality, you'll need to keep your factory radio, and relocate it inside your dash behind the lower trim panel. This harness has two plugs - one connects to the factory wiring, and the second plugs into the factory radio to provide power to it. If you remove the factory radio, you will lose your factory keyless entry feature.

12V constant power

12V switched power

chassis ground

power antenna turn-on

dimmer

left front speaker +/-

right front speaker +/-

left rear speaker +/-

right rear speaker +/-

Note: Most vehicles will require additional installation parts  please identify your vehicle if you haven’t done so, then check here for a list of parts. You can also call an Advisor for more information.

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Great instructions and fit

I actually modified my harness (removing the second connector) because I didn't want to keep my keyless entry, as it hadn't been working reliably. The instructions are great, with one warning--when it tells you to splice the green/red and green/black wires, look for the light green wires--not the brighter green ones. Once you figure this out, it's pretty easy and straightforward.

If you still aren't sure which wires to splice, a quick YouTube search should point you in the right direction.

Pros:Allows you to keep keyless entry, connects easily

Cons:Instructions refer to green wires, not light green. Wire splice must be done in order to preserve overhead dome light functionality.

Yes!!!!!

Literally the best online purchase of my life. Item shipped fast. I installed in under 30 minutes and it allowed me to tuck the stock radio behind the dash, and use my aftermarket one. It came with instructions for the whole install and works like a charm!!!! So happy! thank you Crutchfield excellent service!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Did not need to keep the old deck

I did not need to keep my old Honda stereo behind the gloove box as I was told for my
auto unlock to work on my 98 Civic. Overall it was esy to install. I ecommand that you
remove the old Civic deck and see if you locks still work, if so then you don't need to
keep the old deck behind the dash.

Works great

This harness did a fine job of connecting my new Sony to the old factory radio (needed to
preserve keyless entry functions) and to the factory wiring in the dash. Note that you'll still
need a soldering iron or a set of wire connectors to connect the harness to the wiring from
your aftermarket radio, however.

Metra 70-1720T Receiver Wiring Harness

Unfortunately the instructions assumed the manufacturer's original radio was still in operation and had not already been replaced by a previous owner of the auto with an Alpine unit. This is likely my error. Therefore instead of rewiring the system using the Crutchfield provided harness; instead cut the existing radio's connection to the harness already in place and soldered the Dual radio's connecter to the interface plug wiring. All is working flawlessly.

Metra 70-1720T Receiver Wiring Harness

This wiring harness was extremely helpful and made the installation of my new reciever a snap. The only advice that would have been helpful and saved me some trouble would have been to have known that the radio that is being replaced also has the seperate cassette player, the cassette player needs to be removed also to make room for the factory radio to be stored if you have keyless entry.

Life made easy

This harness was a tremendous aid in installing our new head unit. We soldered all of the connections with shrink tubing for protection but it could just as easily been done with crimped connectors. Only suggestion would be to include the connectors...

Metra 70-1720T Receiver Wiring Harness

Perfect fit, clean solution, some assembly required

Written By Dennis, Richmond, VA on Friday, October 21, 2005

I bought this for and fitted this into my wife's 1998 Honda Civic EX. The harness is just the right length to fit the old stereo down in front of the shifter (and keep the keyless entry) and the fit of the connectors is superb. The instructions were very clear and make the mate to the stereo harness very easy. I would recommend soldering the wires of this harness with the wires from your radio harness for the cleanest look; you could also use inline crimped wire connectors to keep things fairly neat looking.

When you move the factory radio, make sure you remove the faceplate to keep it from turning on and work on it to get it as far down into the hole behind the cigarette lighter as possible. I found that wrapping the old stereo as described in the included instructions was not an option as it makes fitting the stereo in the hole too difficult. I made a cardboard face to cover the hole left when the faceplate was taken off and that worked fine.

Hands-on research

What's in the box?

Product Research

Features

Crutchfield Wiring Harness: Crutchfield wiring harnesses
prevent you from having to cut your vehicle's factory radio plug when replacing
your factory radio with an aftermarket head unit. Simply solder or crimp the
Crutchfield wiring harness to your aftermarket head unit's harness (solder &
crimps not included), plug the aftermarket head unit's plug into the rear
chassis of the aftermarket head unit, and plug the Crutchfield wiring harness
into your vehicle's factory radio plug.

Note: Installation tools, hardware, & accessories are
not included & sold separately. Please see the Accessories tab for
recommendations & availability.

Wiring Notes: If the Crutchfield wiring harness is not
equipped with a ground wire, you will need to ground the aftermarket head unit's
ground wire to the metal chassis of your vehicle. Some vehicle's may require you
to bypass the vehicle's factory amplifier (in another location from factory
radio) or hardwire certain connections. If your vehicle is equipped with factory
steering wheel controls, an additional adapter is required and sold
separately.

Special Harness Function: This harness is required for
select Honda vehicles that have factory keyless entry built into the factory
radio. When replacing the factory radio with an aftermarket head unit, you will
need to relocate the factory radio behind the lower dash trim panel in order to
retain the keyless entry function. This harness includes a plug that provides
constant and switched power and ground to power the factory radio.

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